Push-button radio tuner



Dec. 15, 1942. J. L. swALLow ,30 ,3 6"

PUSH BUTTON RADIO TUNER Filed Feb. 24, 1940 v 4 Sheets-Shet 2 ffggz wafi 7 Dec. 15, 1942. J. L. SWALL OW PUSH BUTTON RADIO TUNER I Filed Feb. 24, 1940 4 Sheets-Sheet 3 Dec. 15, 1942. I J sw ow 2,305,326

PUSH BUTTON RADIO TUNER Filed Feb. 24, 1940 4 Sheets-Sheet 4 Patented Dec. 15, 1942 PUSH-BUTTON RADIO TUNER Joseph L. Swallow, Lombard, Ill., assignor to Wells-Gardner 8; 00., Chicago, 11]., a corporation of Illinois Application February 24, 1940, Serial No. 320,591

29 Claims.

This invention relates in general to a remote controlled radio tuner operated by push buttons, and is more particularlydescribed as an installation of this .kind for automobiles.

An important object of the invention is in the provision of an improved step by step push control together with visual and illuminated means for indicating the different station positions.

A further object of the invention is in the provision of a, step by step tuning device which is readily variable and adjustable.

Still a further object of the invention is in the provision of improved manual control means in connection with the push button and tuning devices by which it is possible 'to select stations other than those included in the step by step station selection.

Furtherobjects of the invention are in improving and simplifying the mechanisms of the push button and tuning portions for economical production, practical assembly and operation, and satisfactory installation, control, repair and replacement.

Other objects of the invention will appear hereinafter, the preferred construction being illustrated in the accompanying drawings illustrating a preferred embodiment of the invention, in which Fig. 1 is a sectional perspective illustrating the invention as installed in an automobile;

Fig. 2 is a sectional view taken on the line 2-2 of Fig. 1 showing one position of a portion of the step by step and tuning mechanism;

Figs. 3 and 4 illustrate different positions of the mechanism also shown in Fig. 2;

Fig. 5 is an elevation of the outside of the mechanism from the side opposite that shown in Fig. 2;

Fig. 6 is a top or plan view of the mechanism shown in Fig. 1;

Fig. 7 is a sectional view taken on the line 1--1 of Fig. 6;

Fig. 8 is a sectional detail taken on the line 8-8 of Fig. 7;

Fig. 9 is a sectional detail taken on the line 99 of Fig. 6;

Fig. 10 is a perspective of the transverse step by step adjustment shaft;

Fig. 11 is an enlarged view of the front of the manual control plate;

Fig. 12 is a rear view of the control plate and parts supported thereby;

Fig. 13 is an enlarged sectional detail of the push button control taken on the line |3--|3 of Fig. 11;

Fig. 14 is a detail cross section taken on the line l4-l4 of Fig. .13; and

Fig. 15 is an enlarged sectional detail of the manual control mechanism taken on the line I5-l5 ofFig. 11.

This invention does not depend for its novelty upon the radio circuits, connections, or devices, except for the connection with the ,parts necessary to effect a variation of wave lengths or volume in tuning in different stations. The step by step and independent tuning mechanism will first be described and then the connection of the manual push button and independent controls which relate thereto.

Referring now more particularly to the invention, radio cabinet 20 is shown supported by a front panel 2| of .an automobile below the cowl or hood thereof and at the rear of a front instrument panel 22 in which a manual control plate 23 is inserted for convenience in manually operating and observing the radio from the front seat of the vehicle. The radio set receives current from a battery 24 which may be the battery of the automobile or an independent one connected by suitable conductors 25 to the radio receiver itself and also having a ground connection 26 which may be connected to a suitable frame part 21 of the vehicle.

Within the radio cabinet are a number of tuning condensers 28 (Figs. 6 and '7) or other parts for varying Wave lengths in tuning in different stations having movable parts connected by thin wires 29 to a common cross head 30 which is movable toward and from the parts 28 to produce the desired wave length variations.

At the ends of the cross head 30 are perforated ears 3| to receive the ends of a mounting cross bar 3-2, the extremities of which extend through opposite slots 33 in end plates 34 and '35 At the outer side of each end plate '34 is an arm 36 pivoted at its lower end upon a transverse shaft 31 mounted in the end plates and each having a slot 38 at its upper end extending across the slot 33 and engaging the end of the cross shaft 32. The shaft 31 has a projection 39 at its under side engaged by end of a coil spring 40 (see Fig. '7), the other end connected to a supporting plate 4| through which the control wires 29 extend, the action being such that the spring 49 tends to rotate the shaft 31 and the upper ends of the arms 36 move the cross head 35! and the wires 29 outwardly from the plate M and the tuning devices 28. In seating or positioning the cross shaft}? in the end plates, either one or both of them may be provided with an undercut recess 42 at the lower edge into which the shaft is inserted and held against removal by the spring 40.

A toothed adjustment shaft 43 is rotatably mounted in the end plates between two spacing and supporting plates 44 and the free rotation of this shaft is prevented by a contact spring 45 extending between the upper ends of the plates and engaging in a reduced groove 46 near one end of the shaft. At one end of the shaft outside of the end plate 35 is a step by step control disc 41 having teeth 48 projecting therefrom, and on the shaft itself are helically spaced teeth 49 and a tooth 59 corresponding to the teeth of the disc.

Overlying the adjustment shaft 43 is the step by step and manual tuning mechanism which comprises a number of push button sleeves and a manual control sleeve 52, each formed with a transverse perforated projection 53 at its upper side through which a mounting shaft 54 extends, the ends of the shaft being suitably secured in the end plates 34 and so that each sleeve is free to rotate thereon but is drawn downwardly at its inner end by a coil'spring 55 attached at one end to a flange 56 of thesupporting plate 4| and having an extension 51 at the other end attached to a hook 58 adjacent the mounting projection 53. The springs 55 tend to depress the inner end of each of the sleeves so that they are pressed downwardly in engagement with the upper end of one of the cross plates 44.

Each sleeve 5| has a threaded perforation 59 at its inner end and a larger opening 60 throughout the remainder of the sleeve for receiving the threaded portion of an adjusting screw 6| inthe threaded portion 59 and for loosely receiving a head 62 of the screw in the opening .60 of the sleeve. ment screw is rounded and unthreaded and is adapted to engage in an angular seat formed at the lower edge the cross plate 30 by a flange 64 extending from the lower edge of the cross plate having an angularly up-turned edge 65 and by securing thereto a plate 65 having an angular downwardly turned edge 61. In a similar manner the sleeve 52 receives a threaded screw 68 having an unthreaded and rounded extremity 69 projecting through the inner end of the sleeve; and surrounding the screw is a hollow shell H1 accommodated in a recess 1|, the shell being formed with a longitudinal slot 12 slidably receiving a pin 73 which projects from the adjacent end of the screw. Attached to the outer or free end of the shell I0 is a flexible cable 14 by means of which it may be turned in either direction, the rotary movement of the shell producing a corresponding longitudinal movement of the screw in the threaded end of the sleeve 52.

All of the adjustment screws 6| and 68 are moved by their springs 55 to a position engaging the upper edge of the cross plate 44 where they are out of alignment and below the angular engagement notch of the cross plate 30. In order to place any one of the adjustment pins into alignment with the angular notch of the cross plate 30 the adjustment shaft 43 is rotated until the proper tooth 49 or 58 is moved by rotation of the shaft to raise it into the desired engaging position. This shaft is moved in a step by step motion and is shown with six teeth corresponding to the six teeth in the ratchet disc 41 and to the five step by step sleeves 5| and one manual adjustment sleeve 52 of the tuning device.

The outer extremity 53 of each adjust- In order to accurately adjust the screws in the sleeves 5| a thin plate or screw driver is inserted in the opening 65 into engagement with the slot in the head 62 of the screw for adjusting it in either direction to vary the tuning for that particular device. Each screw is frictionally held in its sleeve 5| by cutting a notch 15 at one side thereof intersecting the threaded opening 59 (see Fig. 8) and a contact pin 16 is placed around the rest of the sleeve member but disposed in the slot in contact with the exposed threaded edge of the screw; the ends of the pin are looped or twisted together, and thus the screw is held frictionally against loosening movement in either direction.

At the same time the adjustment shaft 43 is rotated in a step by step movement, the tuning cross-plate 35 is also actuated in order to move its angular engagement notch free from contact with any one of the adjustment screws. This is effected as shown more clearly in Figs. 2, 3 and 4 by an escapement mechanism comprising a slide 11 located at the outside of the side plate 35 adjacent the ratchet disc 41 and mounted at the top is a guide rod 18 supported at one end by the plate 4| and at the other end in an car 18' struck out of the side wall 35. At the bottom the slide is mounted upon a rod 18 secured at one end to the plate 4| and at the other end in a bent extremity of the side plate 35. At its lower end the slide is formed with an upwardly projecting angular extremity 8| bent to engage the ratchet teeth 48 limiting the movement of the ratchet as shown in Fig. 4. This extremity is also engaged and movedjby contact with the end of the push button slidebar 82 so that each time the push button is actuated the slide 11 is moved into the path of the ratchet teeth 48 against the tension of a spring 83 connected at one end to a plate extension 84 of the slide and at the other end to a fixed projection of the end plate. This plate projection has an angular tooth 85 at the side of the ratchet 41 opposite the angular end 8| and normally is held in engagement with one of the teeth 48 as shown in Fig. 2, by means of the spring 83.

Mounted in the ends of the slide 11 is a slidable escapement bar 85 having a tooth 81 adapted to engage the teeth 48 of the escapement disc and having a spring 88 connected at one end to the slide bar and at the other end to the escapement bar tending to move it in a direction opposite to the movement of the slide bar by its spring 83, the escapement bar having a projection 86' for limiting its movement in the slide bar and the construction and arrangement being such that when the slide 11 is at rest at one end of its movement as shown in Fig. 2, the escapement tooth 81 is free from engagement with the teeth 4-8 of the escapement disc which are then held in place by the holding tooth 85 of the slide bar. As soon as the slide bar is moved to the left by the push button bar 82 the escapement tooth 81 engages one of the lower teeth 48 as the tooth 85 is drawn outwardly from engagement with the opposite upper tooth. The continued movement of the slide to the left causes it to engage a projection 89 extending from the cross bar engaging arm 36 thus moving the cross bar 32 and the tuning cross plate to the left and free from a position where it will engage any of the adjustment screws 5| or This continued movement will cause the escapement tooth to move the escapement disc one step or one tooth until the next tooth 43 comes in contact with the angular extremity 81 of the. slide plate. The.

release'of the push button slide bar will cause the spring Site-return the slide bar 11 from its advanced position, the stop tooth--85 will be moved into engagement with the next escapement' tooth, and with further returning movement of the slide 'I'I the latter will engage the stop 96* of the escapement slide bar, returning its tooth 81 to a position free from engagement with the escapement teeth as shown in Fig. 2. l he return of the slide TI under the action of its spring 83 will also produce a return of the push button slide bar 82 for its next movement.

Attached to and rotatable with the push but ton slide bar 82 or with a iiexible cable covering 99 thereof is a gear BI held yieldingly against the bent portion 89 of the end plate 35 by a spring finger 93'which prevents loose movement. This gear meshes with a gear 94 mounted on ashaft 95 and extending to a radio volume con trol device 95 supported by the end plate 35 and having a number of electric contact terminals 9? for the necessary radio circuit connections. The construction of this particular device is important to the present invention only because of its connection with the push button slide bar 32 which is movable longitudinally to efiect'the operation of the step by step slide I1 and is rotatable to operate the volume control device.

At the end of the adjustment shaft 43 opposite the ratchet disc 4-1 is a fiat portion 99 adapted to engage in a disc 99 (see Figs. 5 and 6) which is rotatable in a perforation in an insulation disc I59 supported by brackets IIlI to the side plate 34. "A plurality of separate openings I92are made in the edge of the opening of the plate I 05 below the outer edge of a split con- "tact ring I93 secured to and rotatable with the disc 99, the ring extending beyond the edge of the discand overlying the edges of openings I02. Opposite each opening M2 at the outer side thereof is a perforation I04 in the insulation plate I99 to provide a. simple means for attach-- ing a contact'finger and electrical connector I95 by inserting a rivet I96 therethrough and fasteniz g it through the opening III I. Each electrical connector Iii-5 has a finger I91 overlying its opening I02 and inclined upwardly at the edge to receive a contact projection I98 of the contact ring I93 when it is turned by its shaft into engagement therewith. The outer end of each connector has a perforated head I99 for the attachment of a suitable electrical conductoror connection;

Attached to one of the perforations is aconnector I I9 similar to the connectors I95 but having a spring tongue III which extends inwardly to havea continuous connection with the conductor ring I533 at all times except at the split portion of the ring which therefore locates or determines the starting or disconnected positravel but the contact makers I95 are only engaged insuccession as the ring is rotated by the ring projection I58. Anumber of lamps H4 are therefore provided corresponding in number to the step by step tooth projections 49 of the adjustment shaft, the arrangement being such that a circuit is closed to one of the lamps corresponding to the projection 49. This tooth also corresponds with the ratchet tooth 48 at the end of the shaft and with the tuning sleeves 5 I. Thus when the shaft 43 is rotated to any one of its step by step positions a circuit connection is closed at the end of the shaft which lights a lamp for indi eating to the operator which tuning device is then in operation.

The sixth tooth59 and the corresponding posi tion of the operating shaft relates to the manual operating device consisting of the sleeve 52 and the operating screw 68. shaft is positioned to place the adjusting screw 68 in engagement with the cross head tuning device 30 the cable I4 is manually rotated in either direction and the tuning cross head may be adjusted throughout its entire range of movement without engagement with the step by step operating slide 11 since the projection 89 on the end arm 36 will not engage the slide in its normal or' rest position as shown in Fig. 2, but only when the slide has been released'and operated by the step by step slide bar 82.

In operating the step by step or manual mechanism there is a step by step knob H5 and a manual knob H5 projecting from the front of the dash plate 23 with a wave length indicator dial II'I conveniently located above and between the two adjustment knobs (see Fig. 11).

In the step by step adjustment mechanism the knob H5 has a transparent dial H9 at its outer end through which an illuminated dial H9 may be observed. The knob H5 and the dial H8 are rotatable together but the illuminated dial H9 is stationary and has numerals I29 or characters 1 designating the different step by step stations. Connected to the knob dial is a shaft I2I which is rotatable and longitudinally movable therewith.

Surrounding the shaft and movable longitu dinally therewith is a sleeve I22 held in place on the shaft by spring collars I23 at the ends of the sleeve seated in grooves I24 on the shaft.

This sleeve has radiating projections I25 at one portion of its length forming spaces between them for seating longitudinally extending bars I26 of Lucite or similar material which has the property of carrying light throughout its length so that it may be illuminated by lamps as H4, behind the dial plate 23 and transfer the light to the illuminating dial I I9 at the front of the knob I 5.

In the knob at the end of the sleeve isan outwardly extending projection I2'I having perforations I28 through which the lighting bars I29 extend, the forward edge of the projection also being secured to and carrying the numeral dial H9 in position immediately back of the transparent dial I I8.

The knob projection I I5 is insertable within a cylindrical housing I29 connected firmly at its rear end to the dial plate 23 so that the knob may be depressed therein for a step by step movement of the shaft and of the'flexible slide bar 82 and cable 99 attached to the rear end thereof. The sleeve I22 and one or more of the projections I 25 thereof are seated in a groove I35 of a supporting shell I3I so that the sleeve I22 is movable longi tudinall'y with the shaft IN and the knob H5 but doesnotrotate therewith.

At the outer end of theshell is a flange I32 for engaging a collar I33 which in turn engages-the When the operating 7 outer edge ofan opening through the dial plate 23 and the outer surface of the shell is'threaded for attaching the plate by means of a fastening nut I34 to the inside of the supporting plate. At the extreme inner end of the sleeve is a tubular fitting I35 for extending over the slide bar and cable connection attached to the end of the cable connection I2I. In the wall of the shell inside of the supporting plate are a number of openings I35 corresponding to the spaces between the partitions I25 of the sleeve member I22, each communicating with the light transmitting bars I25 therein.

Mounted on the outside of the shell is a lamp assembly comprising a multiple holder I31 having front resilient portions I38 with opposite notched portions I39 for engaging bayonet mounting pins I 49 for the small electric lamps I I 4 corresponding in number with the openings I36 and-each lamp having a central insulated lighting contact I4I A which presses against the central end contact of the lamp and separate conductors I42 leading thereto and to the corresponding contact makers I05 in the tuning device cabinet 20.

The manual control knob H6 is connected to a shaft I43 which extends through the dial plate 23 and the dash support and at the rear thereof a gear I 44 is secured to the, shaft which meshes with an idler gear I45 and it in turn meshes with a gear I46 which is connected to an indicator or pointer arm I41 which moves over the dial I II at the front of the plate 23. The shaft also continues rearwardly and is connected to the cable I4 which extends to the manual control adjusting screw 68 in the tuning cabinet.

By the operation of the manual control knob I I6 the radio may therefore be tuned entirely independently of the step by step or pushbutton controls, and when the push button controls are in operation, the movement of the manual knob will cause a rotation of the pointer I41 but will have no effect upon the tuning.

In operating the push button knob I I5 the rotation of the knob will serve to connect the radio circuits to the battery or other source of current supply and this may be evidenced by turning on a lamp I48 connected to conductor H2 at the rear of the dial II'I (see Figs. 11 and 12) which will illuminate the dial, or if desired this circuit may be arranged by a proper connection with the contact makers I55, IIII so that this dial will be illuminated only when the manual control is in operation. Whenever the push button selectors are in operation the corresponding dial number I20 wil1 be illuminated to indicate which of the selected stations is at that time in operation.

I claim: a 1. In a direct radio control, a single rotatable and repeating depressible station selecting push button, a separate manually rotatable station selecting control knob, a step by step tuning mechanism connected for operation by the push button to select any one of a plurality of stations in succession, means at one step by step position of the push button for connecting the tuning mechanism for operation by the rotation of the control knob to mechanically select any station, and volume control means operated by rotation of the push button.

2. In a direct radio control, a single repeating depressible station selecting push button which is also rotatable, a separate manually rotatable station selecting control knob, a station tuning mechanism having a plurality of predetermined stations connected for successive selection by the re peated-operation of the push button anda portion of the mechanism being also rotatable for selecting any'station, means at one successive position of the push button for connecting the control knob to the rotatable portion of the tuning mechanism for rotatable selection of any station, and rotatable volume control means connected for operation by the rotation of the push button.

3. In a radio control, a single rotatable and depressible repeating station selecting push button, a separate manually rotatable station selecting control knob, a station tuning mechanism having step by step and rotary station selecting means, means connecting the push button for operating the step bystep means to select any one of a plurality of stations by successive depressions thereof, means at one position of the push button for disconnecting it from the tuning mechanism and for connecting the control knob thereto for manual rotation of the station selecting tuning means to select any station, and volume control means operated by the rotation of the push button independently of the station selected.

4. In a radio control, a single depressible repeating station selecting push button which is also rotatable, a separate manually rotatable station selecting control knob, a station tuning mechanism having step by step and rotary station selecting means, means connecting the push button for operating the step by step means to select any one of a plurality of stations by successive depressions thereof, means in one position of the push button for disconnecting it from the tuning mechanism and for connecting the control knob thereto for manual rotation of the station selecting tuning means to select any station, an indicator in connection with the knob to show the station for which the tuning mechanism is set by the rotation of the knob, and volume control means connected for operation by the rotation of the push button for either push button or manual knob station selection.

5. In a radio control, a single depressible push button, a rotatable manual control knob normally disconnected for tuning, means in connection with the manual control knob for indicating the position in which it is set, a step by step tuning mechanism connected for operation by the push button and at one step position the tuning mechanism being connected for operation by the manual control knob, and illuminated indicators in connection with the push button to indicate which one of a plurality of predetermined stations ha been selected thereby for operation.

6. In a radio control, a depressible push button, a rotatable manual control knob normally disconnected for tuning, an illuminated station indicator operated by the rotation of the control knob, a tuning mechanism operated by the push button to tune in a succession of predetermined stations and then to place the tuning mechanism under the control of the rotatable manual knob for complete tuning movement, and illuminating means in the push button for indicating that one of the stations controlled thereby which has been selected and tuned in by the operation of the push button.

7. In a radio control, a rotatable and manually depressible step by step repeating push button, a step by step tuning mechanism operated to tune in a succession of predetermined stations by successive depressions of the push button, volume controlling means operated by the rotation of the push button, and a non-rotatable illuminated indicator in the push button to show is tuned in.

8. In a radio control, a single rotatable and manually depressible step by step repeating push button, a step by step tuning mechanism actuated to tune in successive stations by successive depressions of the push button, a non-rotatable station indicator within the push button and visible at the front thereof, and means for illuminating the station indicator depending upon the position of the step by step mechanism.

9. In a radio control, a depressible push button,

which station a step by step station tuning mechanism actuated by successive" depressions of thepush button, a stationindicatori within the push". button compris'inga dial wan station designations thereon; a' plurality of: lamps corresponding to the'jstations: ofi'the dial; means for concealing" the lamps from the: front: ofv the: dial; and. alight trans mitting. medium extending from each of the lamps to' a poi'nt adjaceritthe: station indicator in the dial for: illuminating: the station indicator corresponding to the: lamp which is lighted;

10. Inaa radio control; a'depressible push button,. a .step' by step station tuning; mechanism operated by movements of the push button, a station Lindicator carried by the push button and means. for illuminating; the" stations of the indicator in accordancezwithlthe tuning: mechanism, said means comprising; aeperforated shell with lights outside" of the perforations corresponding to: the-stations of the tuning mechanism, and 'a light transmittingba'r extendingfrom each opening' to one of the stations; of the indicator" for illuminating that .station indicator only when the corresponding lamp is'lit.

11. In' a radio control, a rotatable and dep'r-essible repeating; push: button. a station selecting tuning mechanism operated by longitudinal movement of---the push: button for successively tuning different stations; other radio control; mechanism operatediby rotation of the push button, non-rotatable station indicating means carried by the pushbutton and" visible at theaend threof comprising? a sleeve" having: radi ating: projections to fonni longitudinal passages corresponding? to the stations of the indicator, a surrounding shell with openings at a distance from; the indicator; lamps opposite the: openings; andlight-transmitting means in the spaces between the 1 partitions for receiving lightfromthe lamps andtransmitting, it along: the passages to the station indicating; means; the station indicating means maintaining'the same postion independently oi the rotation ofthe push button.

12; Ina ra'diocontrol, a single repeatingpush button and a shaft connected thereto movable longitudinally and rotatably, station selecting, mechanism: actuated by longitudinal: movement of: theshaftand: push button; other radio controlling; means: actuated by; rotationof' the shaft and: push button,- station indicating means in connection with the push button comprising a stationary shell in: which the. shaft; is-movable having perforations-therein at; a distance from thepush-button, a plurality of lamps corresponding to. the selected stations arranged opposite the openings, the light therefrom being masked from'the front'of the push buttonmeans' forming" separate partitions andp'assages" along the shaft" from theopeningsin the shell to the front of the push button; a-visible station indicatorsurround ing the shaft and supported in the shell against rotation with the shaft at the front'of thepas sages, said means being movable longitudinally with the shaft and push button, and light-transmitt-ing bars located in the passages receiving light through the openings and operative to illuminate the corresponding station indicating means at the front of the push button, the station indicating means being fixed against rotation independently of the rotated position of the push button.

13. In a radio control", a panel mounting plate, a rotatable and depressible repeating push button mounted in the front of the plate, radio tuning means operable to select any one of a plurality of stations by the depression of the push button, other radio control means operated by th'erota'tion of the push button, a non-rotatable: station indicator in connection with the push button and visible from the front ofthe plate, a plurality of lamps at the back of the plate invisiblefrom the front thereof corresponding to the stations controlled by the push button, and light-transmitting means extending from the lamps back of the plate to the station indicatingime'a'ns at the front of the plate for illumiating-the station indicating means at the knob corresponding to the stations selected thereby.

1 4; In aradio controL-a' movable tuning member, means tending to move the member in a given direction, a plurality of adjustable engaging devices movable into the projected path of the member, and direct mechanical step by step means including a manually depressible pusli buttonfor moving the devices successively into the path of the member and the number of depressions from the starting position determining the station for which it is tuned. 15,; Ina: direct radio control, a tuning member and means tending to move it in one direction, a V plurality of tuning devices pivotally mounted upon a tra'n'sverseaxis, means for moving the tuning devices in succession into the path of the tunin'g member for setting the tunm r'neiriber' for a predetermined station, and

mechanical repeating'manual push button means for actuating said moving means in succession for a succession of stations until the desired predetermined station is reached, the number of depressions only of the manual repeating push button from any station position determining the new station which is tuned in.

' 16pm a direct mechanical radio control, a tuning member and means tending to project it in oneclirection', a plurality of adjustable tunirig-dev'ices mounted upon a transverse axis and movable into the projected' path of the tuning member', -and means for first movingthe member freefrom the tuning devices before it is projectedinto engagement with any selected one of the" devices, said means comprising a step by step mechanism and'a repeating manual push button for actuating the mechanism. by successive depressions of the push button, difierent a selected device, and a manual push button for ctuating the mechanism by successive depressicns thereof.

18. In a direct mechanical radio control, a

tuning member including a transverse cross head,

means for confining the cross head to a movedevices in succession into the path of the cross head.

19. In a direct mechanical radio control, a movable tuning member, means tending to project the member in one direction, a plurality of tuning devices movable into the path of the member, a shaft with projections thereon for controlling the movement of the devices into the path of the member, an escapement mechanism in connection with the shaft for rotating it with a step by step movement to move the tuning devices into the path of the member, and manual push button means for actuating the mechanism by successive depressions of the push button.

20. In a direct mechanical radio control, a tuning member and spring means tending to move it in one direction, a plurality of tuning devices movable into the path of the tuning member, means for actuating the tuning devices in succession, said means comprising a rotatable shaft with projections thereon for engaging the devices, a toothed escapement member at the end of the shaft, an escapement slide movable to actuate the toothed-member in a step by step movement and to engage the tuning member to Withdraw it from engagement with one tuning device before the next device is placed in the projected path of the tuning member, and a repeating push button for actuating the escapement slide.

21. In a direct mechanical radio control, a movable tuning member and means tending. to project it in one direction, a plurality of adjustable tuning devices separately movable into the projected path of the member, a step by step escapement mechanism for moving the devices in succession into the projected path of the member, a repeating push button for operating the escapement mechanism, and means in connection with one of the devices for manually actuating it to variably engage the member throughout the range of its projected movement independent of the other tuning devices.

22. In a radio control, a movable tuning member and resilient means for projecting it in one direction, a plurality of tuning devices movable into the projected path of the member, a step by step escapement mechanism for determining which of the devices is moved into the path of the member, one of the devices having a manually operable screw for engagement with the member turnable in either direction to move the member against the resilient pressure throughout its entire range of movement independently of the other devices, and a repeating push button for operating the escapement mechanism.

23. In a radio control, a tuning member and means for moving it in one direction,an escapementflslidei and means for moving it and :the member in the other direction, a plurality. of tuning devices movable into the projected path of the member for' varying the tuning thereof, one

of said devices having a manually movable contactfor engaging the member to move it'throughout its range of movement independently of the other devices, a volume. control device and 'a connection between the :volume controlling ld'evice and the escapement slide for actuating the device by rotating the .means independently of the escapement movement, thereof, and a repeating push buttonfor the escapement slide.

24. Ina radio control, a tuning member and means tending to project it'in one direction, a plurality of' tuningdevices each movable into the path of the tuning member, one of the devices having an adjustable engaging stop which is manually rotatable for independently moving the member throughout its range of movement, a volume controlling device, a step by step escapement mechanism comprising a shaft with projections thereon for separately engaging the tuning devices and an escapement slide, anda rotatable and longitudinally movable controller including a repeating push button for engaging the slide and the escapement mechanism in its longitudinal movement, and for engaging thevolum control device by the rotation thereof.

25'. In a radio control, a movable tuning member, a plurality of devices each separately movable into the path of the tuning member, each device comprising a sleeve threaded at one end having a screw threaded in and extending from one end of the sleeve' with the head of the screw inside of the sleeve, the end of the screw engaging the member to limit its movement in one direction, and the head of the screw being accessibio. for adjustment through the opening at the other end of the sleeve, and selective operating means for the devices comprising a step by step escapement mechanism, and a single repeating push button for the mechanism. V

26. In a radio control, a tuning n ember and means for moving it in a predetermined path, a. plurality of adjustable devices for engaging and determining the tuning position of the member, each device comprising a movable sleeve, an adjusting screw threaded into and through one end of the sleeve with a slotted headfor varying the projection of the other end from the sleeve, a slot'in the sleeve intersecting the opening for the screw therein and a frictional contact device around the sleeve and'seated in the slot against the threaded screw for holding it therein against turning, and. means for operating the devices in succession comprising a single repeating push buttons 27. In a radio control, a movable tuning member, a plurality of tuning devices separately movable into the path of the member, a rotatable shaft with projections thereon for determining which device is moved into "the path of the member, an escapementmechanis'm at one end of the shaft for controlling the rotation thereof, 'a single repeating push button for operating the escapement mechanism step. by step and an electrical switch mechanism at the other end of the shaft with indicating means connected thereto for closing circuit connections to the means in accordance with the circuit closing device which is actuated by the shaft, to indicate which tuning device is in operation. e a

7 28; In a radio control, a tuning member come prising a cross head for connection to a plurality of radio tuning devices, a cross shaft extending through and beyond the cross head, a pair of side plates having straight slots through which the ends of the shaft extend for defining a. straight line movement of the shaft and cross head, a pair of arms pivotally mounted upon a parallel axis at a distance from the mounting shaft and having open slots in the ends traversing the slots at the plates, and tuning devices movable intothe path of the cross head as determined by the slots in the plates.

29. In a radio control, a tuning member comprising a cross head for connection to radio tuning means and movable in a predetermined path, means in connection with the cross head forming an angular engagement channel, a plurality of tuning devices each comprising a movable contact member for engaging in the angularengagement channel, and means for moving the devices into and out of the path of the cross head and 10 its channel.

JOSEPH L. SW ALLOW. 

